An apparatus for connecting precast elements, wherein the apparatus includes a first part adapted for being cast into a first one of the precast elements, and the apparatus further includes a second part adapted for being cast into a second one of the precast elements, wherein the first part and the second part are arranged to receive a fastener for fastening the second precast element relative to the first precast element with the fastener crossing a joint between the precast elements at an angle to the joint.

A system and method for securing a roof truss to a load bearing wall is disclosed. A strap is attached to a roof truss at one end and extended to the top of a load-bearing wall. A buckle is placed over the strap to pinch the strap between the vertical and horizontal arms of the buckle. The end of the strap is wrapped back toward the vertical side of the roof truss and a flat plate is placed to pinch the free end of the strap between the buckle and the flat plate. Screws are placed through holes in the flat plate and corresponding holes in the buckle to attach the system to the top of the load-bearing wall. The system and method of the invention provides both horizontal (lateral) resistance and uplift resistance, thus resisting horizontal (lateral) forces while at the same time providing uplift resistance.

A variable assembly PC member includes: a plurality of hollow PC modules, each of which has an upper flange and a lower flange spaced apart from each other, and a pair of webs connecting both ends of the upper flange and the lower flange to form a hollow therein; and connectors connecting the plurality of hollow PC modules with each other in the width direction.

A hybrid shear wall system for construction of massive timber buildings of more than two stories in seismic zones, is provided, which presents a ductile behavior and reduced overturning effect against a lateral load caused by destructive natural events, such as earthquakes or strong winds; the shear wall system comprises an interior frame with articulated nodes of union between columns and sills, to which exterior massive timber panels are joined on both opposite faces, by means of individual energy dissipating connectors; where the frame comprises post-tensioned self-centering means, which together with the articulated nodes, the exterior massive timber panels and the connectors, act together as a unit and allow the shear wall to behave in a ductile manner and with reduced overturning effect under high lateral load.

A flange connector is embedded in precast concrete structural member for use in joining adjacent concrete members together, wherein the flange connector is characterized by a center plate and legs extending back from each side of the center plate. Each of the legs is provided with projections extending from the top edge and bottom edge of the leg, in the same plane defined by the height and length of the leg. The projections extending from the top edge and the bottom edge of the leg may be mirror images of each other, so that the cross-sectional area of the leg is substantially the same over the portion of the leg with the projections. The legs of the flange connector may incorporate additional enhancements to increase the resistance to pull out, including a neck formed by notches in the top and bottom of each leg, adjacent the transition region extending from the center plate and one or more embossments creating a convex area on one side of each leg and a concave area on the opposite side of each leg.

A self-supported PC column joint part. A plurality of accommodation pieces is buried in the upper surface of a lower member to which a PC column is to be joined, has accommodation spaces having open upper parts, and has female threads. A support bar is provided in a pocket formed in the lower end of the PC column, and includes a body coupled to the upper surface of the pocket to protrude and a head at the lower end of the body so as to be accommodated inside the accommodation space. A fixing piece has a through-hole formed in the center thereof such that the body of the support bar passes therethrough, and has threads formed on the outer peripheral surface thereof so as to be screw-coupled to the accommodation piece, thereby fixing the head of the support bar.

The present application relates to a prefabricated concrete beam-column node and a construction method thereof. The construction method of the prefabricated concrete beam-column node includes: assembling node connectors, and mounting studs on each node connector; welding a circumferential reinforcing plate with a groove hole in the center to a middle-rear section of each node connector; mounting a longitudinal rebar on each circumferential reinforcing plate; pouring a concrete beam between two circumferential reinforcing plates; welding a hidden corbel to a side flange of each of structural columns; hoisting the concrete beam, and overlapping each node connector with the corresponding hidden corbel; welding each node connector to the corresponding structural column; and pouring the concrete beam between the circumferential reinforcing plates and the structural columns.

An assembly channel embedded in a concrete structure includes: bolts coupled to a bracket adapted to support an object to be supported; a support member open on top thereof and having both side ends bent inwardly therefrom in such a manner as to prevent heads of the bolts inserted thereinto from being escaped therefrom; a fixed member fixedly coupled to the underside of the support member in such a manner as to be embedded in the concrete structure; at least one or more length reinforcing materials mounted on the inner surface of the fixed member in a longitudinal direction of the fixed member so as to reinforce the strength of the fixed member; and a horizontal plate disposed between the support member and the fixed member in such a manner as to be coupled to the support member.

The present application relates to a prefabricated concrete beam-column node and a construction method thereof. The construction method of the prefabricated concrete beam-column node includes: assembling node connectors, and mounting studs on each node connector; welding a circumferential reinforcing plate with a groove hole in the center to a middle-rear section of each node connector; mounting a longitudinal rebar on each circumferential reinforcing plate; pouring a concrete beam between two circumferential reinforcing plates; welding a hidden corbel to a side flange of each of structural columns; hoisting the concrete beam, and overlapping each node connector with the corresponding hidden corbel; welding each node connector to the corresponding structural column; and pouring the concrete beam between the circumferential reinforcing plates and the structural columns.

The present invention relates to a precast concrete member using a PC member, which comprises a prefabricated plate and fixing channels, and is used as a linear member for a column which is an axial force member, as a planar member for a wall which is an axial force member, or as a linear member for a beam or a girder which is a flexural member. A preferred embodiment of the present invention provides a premade precast concrete member having a PC body formed at a predetermined length and multiple steel reinforcements embedded within the PC body along the longitudinal direction, the precast concrete member comprising: a plate assembly in which a pair of board-like plates having a pair of coupling holes formed to be penetrated at a regular interval are formed so as to be spaced apart from each other and to face each other, or two pairs of board-like plates are spaced apart from each other so as to face each other, with one end of each thereof being embedded into one or both longitudinal ends of the PC body, and the other ends thereof protruding, wherein the plate assembly comprises a connecting member of which a part embedded into the PC body of the plate is welded to one side of the steel reinforcement, and both ends are respectively bolt-coupled to the coupling holes of a pair of plates so as to connect a part embedded into the PC body of a pair of facing plates; and fixing channels which comprise a U-shaped channel having an opening formed on the top thereof and multiple anchor bodies coupled to the rear surface of the U-shaped channel, the opening of the U-shaped channel comprising a rib which is formed to be bent inwardly, wherein at least two rows of fixing channels are embedded at regular intervals into one side surface of the width direction of the PC body or into at least one pair of corresponding surfaces of the width direction of the PC body.